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166

Pessimistic Lock Timeouts setting

) - and my test case is failing here. The issue is that once the pessimistic lock is in place on the record ... William Support of pessimistic lock timeout setting (javax.persistence.lock.timeout) was just added in ... have to stress, that the pessimistically locked entity has a transaction propagation of REQUIRES_NEW
159

EntityTransaction.commit() does not release a pessimistic lock

It appears that EntityTransaction.commit() does not release a pessimistic lock -> test code ... (); Account a1 = em1.find(Account.class, 0, LockModeType.PESSIMISTIC_WRITE); a1.credit(10); em1.getTransaction().commit(); System.out.println(em1.getLockMode(a1)); // -> PESSIMISTIC_WRITE
138

Pessimistic lock

Pessimistic lock
112

Locking in JPA

JPA 2 supports both optimistic locking and pessimistic locking. Locking is essential to avoid ... to pessimistic locking it is easier to use and more efficient. In the rare cases in which update collision must be revealed earlier (before transaction commit) pessimistic locking can be used. When using
91

LockModeType.PESSIMISTIC_WRITE

Enum Constant javax.persistence.LockModeType PESSIMISTIC_WRITE Pessimistic write lock. Since: JPA 2.0
91

LockModeType.PESSIMISTIC_READ

Enum Constant javax.persistence.LockModeType PESSIMISTIC_READ Pessimistic read lock. Since: JPA 2.0
91

LockModeType.PESSIMISTIC_FORCE_INCREMENT

Enum Constant javax.persistence.LockModeType PESSIMISTIC_FORCE_INCREMENT Pessimistic write lock, with version update. Since: JPA 2.0
45

Setting and Tuning of JPA Queries

. JPA 2 adds support for pessimistic locking. The setLockMode method sets a lock mode ... execution sets a pessimistic WRITE lock on all the result objects:   List<Country> results = query.setLockMode(LockModeType.PESSIMISTIC_WRITE) .getResultList(); Notice that when a query
32

ObjectDB Object Database Features

(always active). Implicit pessimistic locking (JDO). Explicit pessimistic locking (JPA 2). Always Object Level locking. Lock modes: READ/WRITE, OPTIMISTIC/PESSIMISTIC. Database Tools and Utilities ObjectDB
30

Pessimistic lock timeout - blocks indefinitely

I've attached a simple test which creates an object then kicks off several threads which each try to update the object. I'm using a pessimistic lock with timeout as follows: Map<String,Object ... ); MyEntity loaded = em.find(MyEntity.class, 1, LockModeType.PESSIMISTIC_WRITE, properties

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